(a) Permanent stabilization of conveyance channels must be shown for all channels and outfalls to prevent erosive flows. Measures may include erosion control matting, sodding, or rock riprap. All on-site storm water conveyance channels, except roadway ditches, shall be minimally designed and constructed to withstand the expected velocity of flow from a 10-year, 24 hours frequency storm without erosion. Stabilization adequate to prevent erosion shall also be provided at the outlets of all pipes and paved channels. Permanent stabilization of ALL non-paved channels carrying storm water including roadside ditches must consist of excelsior matting in the bottom of the channel.
(b) All constructed waterways/drainage ways not directed to a sediment basin must be stabilized either temporarily or permanently immediately following construction to prevent scour and erosion from occurring. All culvert outlets must have rock channel protection placed immediately following construction.
(Ord. 15-O-2820, passed 5-19-2015)